LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION The **LK112SM18TR** is a low-dropout (LDO) voltage regulator manufactured by **STMicroelectronics (ST)**.  

### **Specifications:**  
- **Input Voltage Range:** Up to **18V**  
- **Output Voltage:** **1.2V** (fixed)  
- **Output Current:** **1A** (maximum)  
- **Dropout Voltage:** **300mV** (typical at 1A)  
- **Line Regulation:** **0.2%** (typical)  
- **Load Regulation:** **0.4%** (typical)  
- **Quiescent Current:** **6mA** (typical)  
- **Operating Temperature Range:** **-40°C to +125°C**  
- **Package:** **SOT-223** (surface-mount)  
- **Protection Features:** Thermal shutdown, current limit  

### **Descriptions and Features:**  
- Designed for **low dropout** and **high-efficiency** applications.  
- Stable with low-ESR ceramic capacitors.  
- Suitable for **battery-powered devices, industrial, and automotive applications**.  
- **Low noise** and **high PSRR (Power Supply Rejection Ratio)** for sensitive circuits.  
- **RoHS-compliant** and **lead-free**.  

This regulator is optimized for **space-constrained designs** requiring stable power delivery.

LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION